package cn.tedu.v3_1;

import java.io.*;
import java.net.*;
import java.util.*;

/**
 *Server 端---流置空 升级 JavaOOP 私有化属性
 */
public class Server {
    private ServerSocket serverSocket;

    private static final Integer PORT = 1019;

    public Server() {
        try {
            serverSocket = new ServerSocket(PORT);
        } catch (BindException e) {
            System.out.println("请检查端口号，被占用~");
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public void start() {
        try {
            while(true) {
                System.out.println("等待客户端连接");
                Socket socket = serverSocket.accept();
                new Thread(new ClientHandler(socket)).start();
            }
        } catch (IOException e) {
            System.out.println("客户端链接断开链接~");
        } finally {
            if(serverSocket!=null&&!serverSocket.isClosed()){
                try {
                    serverSocket.close();
                } catch (IOException e) {
                    System.out.println("服务器关闭失败~~~");
                }
                System.out.println("服务器关闭成功~~Over");
            }
        }
    }

    public static void main(String[] args) {
        new Server().start();

    }

    //ClientHandler多线程类：控制客户端发来的通讯消息
    private class ClientHandler implements Runnable {
        private Socket socket;
        private String ip;
        //Server ---CS类 ----输入 输出 流 关闭
        //Client ---start()---输入 输出 流 关闭
        private PrintWriter pw;
        private BufferedReader br;
        public ClientHandler(Socket  s) {
            //1.明确接入客户端 通讯类 Socket
            this.socket= s;
            //2.给明确接入客户端，IP地址
            ip = socket.getInetAddress().getHostAddress();
            //3.给明确接入客户端，读写功能
            try {
                br = new BufferedReader(new InputStreamReader(socket.getInputStream(), "UTF8"));
                pw = new PrintWriter(new BufferedWriter(new OutputStreamWriter(socket.getOutputStream(), "UTF8")), true);
            } catch (IOException e) {
                System.out.println("客户端断开连接了~~");
            }


        }

        public void run() {

            try {
                new Thread(() -> {

                    try {
                        String message;
                        while ((message = br.readLine()) != null) {//读入客户端
                            System.out.println(ip + "客户端说：" + message);
                        //1.6 增加一句--每次客户端发给服务器内容
                            System.out.print("服务器端请输入：");
                        }
                    } catch (IOException e) {
                        System.out.println("客户端发来的消息断开了");
                    }
                }).start();
                //1.5增加写出操作【修改目的：读入写出通顺】
                //1.5.1 控制台卡住--输入内容
                Scanner input = new Scanner(System.in);
                //1.5.2 一直写出
                while (true) {
                    System.out.println("服务器请输入：");
                    String sme = input.nextLine();
                    pw.println("服务器说" + sme);
                }
                }finally {
            if (br != null)
                try {
                    br.close();
                } catch (IOException e) {
                    System.out.println("读入流断开链接~");
                }
                if (socket != null && !socket.isClosed()) {
                    System.out.println(ip + "一个客户端退出服务器链接~~");
                    try {
                        socket.close();
                    } catch (IOException e) {
                        System.out.println(ip + "一个客户端退出链接异常~~");
                    }

                }
            }
        }
    }}



